Information Processing Apparatus, Information Processing Method, and Program

1. An information processing apparatus, comprising: a sensor that includes an input surface for accepting an input operation of a user using a writing tool and is capable of detecting: first coordinates of a first contact position at which the input operation is made and a first weight applied to the first contact position; and second coordinates of a second contact position where a hand of the user touches the input surface at a time the user makes the input operation using the writing tool, and a second weight applied to the second contact position; a storage section; and a controller capable of: causing the storage section to store, at selected time intervals: first coordinate data indicating the detected first coordinates and first weight data indicating the first weight, wherein the first coordinate data and the first weight data are stored in association with identification information of the user; and second coordinate data indicating the detected second coordinates and second weight data indicating the second weight, wherein the second coordinate data and the second weight data are stored in association with the first coordinate data, the first weight data, and the identification information; and reading out the stored first coordinate data and first weight data from the storage section in association with the identification information.

2. The information processing apparatus according to claim 1 , wherein the controller is capable of calculating movement velocity data indicating a movement velocity of the first coordinates from the first coordinate data stored at the selected time intervals.

3. The information processing apparatus according to claim 1 , wherein the controller is capable of calculating weight change data indicating a temporal change of the first weight from the first weight data stored at the selected time intervals.

4. The information processing apparatus according to claim 1 , wherein the input operation comprises a first input operation, and wherein the controller is capable of comparing third coordinates and a third weight detected from a second input operation made using the writing tool after the first coordinate data and the first weight data are stored, with the stored first coordinate data and first weight data and judging whether there is a difference.

5. The information processing apparatus according to claim 4 , wherein the controller is capable of authenticating the user based on the judgment on whether there is a difference and outputting an authentication result.

6. The information processing apparatus according to claim 5 , further comprising a display section, wherein the controller is capable of controlling the display section to display, based on the input operation, an image showing a trajectory from a start to an end of the input operation using only the first coordinate data out of the first coordinate data and the first weight data.

7. The information processing apparatus according to claim 4 , further comprising an output section, wherein the controller is capable of controlling the output section to output information indicating the judged difference.

8. The information processing apparatus according to claim 1 , further comprising a display section, wherein the controller is capable of controlling the display section to display, based on the stored first coordinate data and first weight data, a first image that shows a trajectory from a start to an end of the input operation of the user.

9. The information processing apparatus according to claim 8 , wherein the input operation comprises a first input operation, wherein the image comprises a first image, wherein the sensor is capable of detecting, after the display of the first image, third coordinate data and third weight data from a second input operation made by a second user using the writing tool, and wherein the controller is capable of: controlling the display section to display, based on the detected third coordinate data and the third weight data, a second image that shows a trajectory from a start to an end of the second input operation of the second user while superimposing the second image on the first image; comparing the stored first coordinate data and first weight data with the third coordinate data and the third weight data detected from the second input operation of the second user; and controlling the display section to display information indicating a difference between the first image and the second image.

10. The information processing apparatus according to claim 9 , wherein the controller changes a line width or shading of the first image and the second image according to the stored third weight data and the third weight data detected from the second input operation of the second user.

11. The information processing apparatus according to claim 1 , further comprising: a communication section; wherein the controller controls the communication section to transmit the stored first coordinate data and first weight data to another information processing apparatus; and wherein the another information processing apparatus displays an image that shows a trajectory from a start to an end of the input operation of the user based on the transmitted first coordinate data and first weight data.

12. An information processing method, comprising: detecting, by a sensor including an input surface for accepting an input operation of a user using a writing tool, first coordinates of a first contact position at which the input operation is made and a first weight applied to the first contact position; detecting, by the sensor, second coordinates of a second contact position where a hand of the user touches the input surface at a time the user makes the input operation using the writing tool, and a second weight applied to the second contact position; storing, by a storage section, at selected time intervals: first coordinate data indicating the detected first coordinates and first weight data indicating the first weight, wherein the first coordinate data and the first weight data are stored in association with identification information of the user; and second coordinate data indicating the detected second coordinates and second weight data indicating the second weight, wherein the second coordinate data and the second weight data are stored in association with the first coordinate data, the first weight data, and the identification information; and reading out the stored first coordinate data and first weight data from the storage section in association with the identification information.

13. A computer-readable storage medium having stored thereon instructions that, when executed by at least one processor, perform a method for information processing, the method comprising: detecting, by a sensor including an input surface for accepting an input operation of a user using a writing tool, first coordinates of a first contact position at which the input operation is made and a first weight applied to the first contact position; detecting, by the sensor, second coordinates of a second contact position where a hand of the user touches the input surface at a time the user makes the input operation using the writing tool, and a second weight applied to the second contact position; storing, by a storage section, at selected time intervals: first coordinate data indicating the detected first coordinates and first weight data indicating the first weight, wherein the first coordinate data and the first weight data are stored in association with identification information of the user; and second coordinate data indicating the detected second coordinates and second weight data indicating the second weight, wherein the second coordinate data and the second weight data are stored in association with the first coordinate data, the first weight data, and the identification information; and reading out the stored first coordinate data and first weight data from the storage section in association with the identification information.

14. The information processing method of claim 12 , further comprising: calculating movement velocity data indicating a movement velocity of the first coordinates from the first coordinate data stored at the selected time intervals.

15. The information processing method of claim 12 , further comprising: calculating weight change data indicating a temporal change of the first weight from the first weight data stored at the selected time intervals.

16. The information processing method of claim 12 , wherein the input operation comprises a first input operation, and wherein the method further comprises: comparing third coordinates and a third weight detected from a second input operation made using the writing tool after the first coordinate data and the first weight data are stored, with the stored first coordinate data and first weight data and judging whether there is a difference.

17. The computer-readable storage medium of claim 13 , wherein the method further comprises: calculating movement velocity data indicating a movement velocity of the first coordinates from the first coordinate data stored at the selected time intervals.

18. The computer-readable storage medium of claim 13 , wherein the method further comprises: calculating weight change data indicating a temporal change of the first weight from the first weight data stored at the selected time intervals.

19. The computer-readable storage medium of claim 13 , wherein the input operation comprises a first input operation, and wherein the method further comprises: comparing third coordinates and a third weight detected from a second input operation made using the writing tool after the first coordinate data and the first weight data are stored, with the stored first coordinate data and first weight data and judging whether there is a difference.